H II region
Videos
An H II region is a region of interstellar atomic hydrogen that is ionized. It is typically in a molecular cloud of partially ionized gas in which star formation has recently taken place, with a size
NGC 604, a giant H II region in the Triangulum Galaxy, taken by the Hubble Space Telescope
Dark star-forming regions within the Eagle Nebula commonly referred to as the Pillars of Creation
Orion Nebula
A small portion of the Tarantula Nebula, a giant H II region in the Large Magellanic Cloud
Nebula
Videos
A nebula is a distinct luminescent part of interstellar medium, which can consist of ionized, neutral, or molecular hydrogen and also cosmic dust. Nebulae are often star-forming regions, such as the P
H II region
…1774, and described it later as "an unformed fiery mist, the chaotic material of future suns". In early days astronomers distinguished between "diffuse nebulae" (now known to be H II regions), which retained their fuzzy appearance under magnification through a large telescope, and nebulae that could be resolved…
True color image of the Trifid Nebula, showing complex gas and plasma structure
Portion of the Carina Nebula
The Omega Nebula, an example of an emission nebula